The president-elect’s opening salvo in trade and border talks with the United States’ neighbors is casting a harsh light on the North American alliance.

A post on Truth Social by President Elect Donald Trump shattered the calm that had fallen on Washington DC in the days ahead of the Thanksgiving holiday when the U.S. Congress was in recess. The post read:

President-elect Donald Trump intends to follow through on his plan to impose sweeping tariffs on America’s top trading partners — a move that could come at a high cost to U.S. consumers. On Monday, Trump promised a new tariff on all products entering the U.